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木瓜蛋白酶中英文说明书
2022-06-24 20:55:00 【Sylvia_sc】
Papain is a sulfhydryl protease from Carica papaya latex. It has a molecular weight of 23 kDa and an optimum pH range of 6.0-7.0. The action of papain on leucine methyl ester produces an insoluble polyleucine peptide. Papain breaks down the intercellular matrix of cartilage. Papain is activated by cysteine, sulfide, and sulfite. Stabilizing agents are EDTA, cysteine and dimercaptoethanol.
Stability/Storage: Stable for 6-12 months at 2-8°C. Do not freeze aqueous suspensions.
Technical Notes: Papain preparations should be incubated in the activation solution before use to ensure full activity. Applications include antibody fragmentation and primary/neural cell isolation.
Unit Definition: One Unit hydrolyzes one micromole of benzoyl-L-arginine ethyl ester per minute at 25°C, pH 6.2, after activation in a solution containing 1.1 mM EDTA, 0.067 mM mercaptoethanol and 5.5 mM cysteine-HCl for 30 minutes.
木瓜蛋白酶功能特性:
木瓜蛋白酶主要用于啤酒抗寒(水解啤酒中的蛋白质,避免冷藏后引起的浑浊)、肉类软化(水解肌肉蛋白和胶原蛋白,使肉类软化)、谷类预煮的准备、水解蛋白质和肉类香料的生产。在啤酒抗寒和肉类软化方面的应用远比其他蛋白酶类广泛。
艾美捷Worthington 木瓜蛋白酶特异性:
木瓜蛋白酶具有相当广泛的特异性;它具有内肽酶、酰胺酶和酯酶活性。活性位点由七个亚位点(S 1 -S 4和 S 1' -S 3')组成,每个亚位点可以容纳底物的一个氨基酸残基(P 1 -P 4和 P 1' -P 3')(Schechter和伯杰 1967)。特异性由 S 2亚位点控制,S 2 亚位点是一个容纳底物 P 2侧链的疏水袋。木瓜蛋白酶表现出特定的底物偏好,主要是对该子位点的大量疏水或芳香残基(Kimmel 和 Smith 1954)。在 S 2之外子位点偏好,活性位点内缺乏明确定义的残基选择性。
木瓜蛋白酶相关研究:
胶原酶 (CLS1-4/CLSPA)
脱氧核糖核酸酶 I (DP/D/DCLS/D2/DPFF/DPRF)
透明质酸酶 (HSE/HSEP)
中性蛋白酶 (Dispase, NPRO)
蛋白酶 K (PROK)
胰蛋白酶 (TL/TRL/TRL3/TRLS /TRTPCK)
胰蛋白酶抑制剂 (LBI/OI/SI/SIC)
细胞分离优化系统 (CIT)
肝细胞分离系统 (HIS)
新生儿心肌细胞分离系统 (NCIS)
木瓜蛋白酶解离系统 (PDS/PDS2)
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